{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2743MTCX/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2743MTCX-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM2743MTCX-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM2743MTCX%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2743MTCX/NOPB, Buck PWM Controller, Step-Down Topology, 1 Output, 50kHz to 1MHz, 3V to 6V Supply, 14-TSSOP Package, -40°C to 125°C.","salesMarkdown":"## Buck controller for point-of-load regulation The Texas Instruments LM2743MTCX/NOPB is a single-phase, step-down (buck) PWM controller designed for non-isolated DC-DC conversion. It drives an external N-channel MOSFET pair — one high-side, one low-side — in a synchronous rectifier topology, which improves efficiency at low output voltages compared to a diode-based freewheel. The controller operates from a 3V to 6V supply rail and switches between 50 kHz and 1 MHz, set by an external resistor on the frequency-control pin. Output voltage is regulated by the external divider; the part includes current limit, soft start, power-good flag, and tracking for sequencing multiple rails. The 14-TSSOP package suits compact point-of-load designs in industrial control, telecom, and base-station equipment where the -40°C to 125°C junction temperature range covers the thermal extremes of forced-air or enclosed environments. ## Switching frequency and duty cycle — what they mean for the inductor and output cap The 50 kHz to 1 MHz switching range lets the designer trade off inductor size against switching losses. The 80% maximum duty cycle limits the step-down ratio. ## Synchronous rectification and control features The synchronous rectifier driver for the low-side N-channel FET replaces the catch diode, cutting forward-drop loss and improving efficiency at high output current and low output voltage. ## Active lifecycle — no LTB concern for new designs The LM2743MTCX/NOPB carries an Active product status with ROHS3 compliance. This part is suitable for both new production and ongoing BOM maintenance. The NOPB suffix indicates lead-free (RoHS) finish, which matches current assembly requirements for most markets.","metaTitle":"LM2743MTCX/NOPB Buck Controller, 50kHz-1MHz, 14-TSSOP","metaDescription":"LM2743MTCX/NOPB step-down buck controller from TI. Switching frequency 50kHz to 1MHz, -40°C to 125°C operating range. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"14-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking","Duty Cycle (Max)":"80%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"50kHz ~ 1MHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Supplier Device Package":"14-TSSOP","Voltage - Supply (Vcc/Vdd)":"3V ~ 6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.57","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.57000","currency":"USD"},{"qty":10,"price":"$2.31200","currency":"USD"},{"qty":25,"price":"$2.18080","currency":"USD"},{"qty":100,"price":"$1.85820","currency":"USD"},{"qty":250,"price":"$1.74476","currency":"USD"},{"qty":500,"price":"$1.52666","currency":"USD"},{"qty":1000,"price":"$1.26495","currency":"USD"},{"qty":2500,"price":"$1.23450","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/29d62f528c68759c2314678932880aa4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can LM2743MTCX/NOPB be synchronized to an external clock?","answer":"No, the LM2743 does not support external clock synchronization. The switching frequency is set by an external resistor on the frequency-control pin."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2743MTCX-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2743MTCX-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}